Question

which cranial nerve controls several essential bodily functions, among them the heart rate and respiratory rate? a) trigeminal b) accessory c) hypoglossal d) vagus

Explanation:

The vagus nerve (cranial nerve X) is a major part of the parasympathetic nervous system. It has extensive functions including regulating heart rate (slowing it down when the body is at rest), respiratory rate (modulating the rhythm), and also influencing digestion, speech, etc. The trigeminal nerve (cranial nerve V) is mainly for facial sensation and mastication. The accessory nerve (cranial nerve XI) controls neck and shoulder muscles. The hypoglossal nerve (cranial nerve XII) controls tongue movements.

Answer:

d) Vagus